Abstract
A modification to the Asymmetrically-Clipped Optical Orthogonal Frequency-Division Multiplexing (ACO-OFDM) technique is proposed through unipolar encoding. A performance analysis of the Bit Error Rate (BER) is developed and Monte Carlo simulations are carried out to verify the analysis. Results are compared to that of the corresponding ACO-OFDM system under the same bit energy and transmission rate; an improvement of 1 dB is obtained at a BER of 10-4. In addition, the performance of the proposed system in the presence of atmospheric turbulence is investigated using single-input multiple-output (SIMO) configuration and its performance under that environment is compared to that of ACO-OFDM. Energy improvements of 4 dB and 2.2 dB are obtained at a BER of 10-4 for SIMO systems of 1 and 2 photodetectors at the receiver for the case of strong turbulence, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 61-68 |
| Number of pages | 8 |
| Journal | Optics Communications |
| Volume | 380 |
| Early online date | 6 Jun 2016 |
| DOIs | |
| Publication status | Published - 1 Dec 2016 |
Keywords
- asymmetrically-clipped optical orthogonal
- DC-biased optical OFDM (DCO-OFDM)
- frequency-division multiplexing (ACO- OFDM)
- multi-level quadrature amplitude modula- tion (M-QAM)
- unipolar OFDM (U-OFDM)
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